From 1ffd9e10b3215f897eec3bb9a17bdf45070f6ae7 Mon Sep 17 00:00:00 2001
From: Alex Stokes <r.alex.stokes@gmail.com>
Date: Mon, 10 Dec 2018 20:33:43 -0800
Subject: [PATCH] Fixes bug with attestation validation that arose from change
 to API

---
 beacon_chain/validation/src/attestation_validation.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/beacon_chain/validation/src/attestation_validation.rs b/beacon_chain/validation/src/attestation_validation.rs
index 4953a92c3..5d45bfcd2 100644
--- a/beacon_chain/validation/src/attestation_validation.rs
+++ b/beacon_chain/validation/src/attestation_validation.rs
@@ -135,7 +135,7 @@ where
          * Allow extra set bits would permit mutliple different byte layouts (and therefore hashes) to
          * refer to the same AttesationRecord.
          */
-        if a.attester_bitfield.len() > attestation_indices.len() {
+        if a.attester_bitfield.num_set_bits() > attestation_indices.len() {
             return Err(AttestationValidationError::InvalidBitfieldEndBits);
         }